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Głaz W, Haskopoulos A, Maroulis G, Bancewicz T. Modeling of interaction induced polarizability of H 2-H, numerical analysis. J Chem Phys 2019; 151:014111. [DOI: 10.1063/1.5100265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Waldemar Głaz
- Nonlinear Optics Division, Faculty of Physics, Adam Mickiewicz University, ul. Uniwersytetu Poznańskiego 2, 61-680 Poznań, Poland
| | | | - George Maroulis
- Department of Chemistry, University of Patras, GR-26500 Patras, Greece
| | - Tadeusz Bancewicz
- Nonlinear Optics Division, Faculty of Physics, Adam Mickiewicz University, ul. Uniwersytetu Poznańskiego 2, 61-680 Poznań, Poland
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El-Kader MSA, Godet JL, El-Sadek AA, Maroulis G. Spectral line shapes of collision-induced light scattering (CILS) and collision-induced absorption (CIA) using isotropic intermolecular potential for H2–Ar. Mol Phys 2017. [DOI: 10.1080/00268976.2017.1338774] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- M. S. A. El-Kader
- Department of Engineering Mathematics and Physics, Faculty of Engineering, Cairo University, Giza, Egypt
- Department of Physics, Faculty of Sciences and Humanity Studies, Shaqra University, Shaqra, Saudi Arabia
| | - J.-L. Godet
- Département de Physique, Laboratoire de Photonique d'Angers, UFR Sciences, Université d'Angers (UBL), Angers, France
| | - A. A. El-Sadek
- Department of Engineering Mathematics and Physics, Faculty of Engineering, Cairo University, Giza, Egypt
| | - G. Maroulis
- Department of Chemistry, University of Patras, Patras, Greece
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Carrington T. Perspective: Computing (ro-)vibrational spectra of molecules with more than four atoms. J Chem Phys 2017; 146:120902. [DOI: 10.1063/1.4979117] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Tucker Carrington
- Chemistry Department, Queen’s University, Kingston, Ontario
K7L 3N6, Canada
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Cho YS, Le Roy RJ. Full empirical potential curves for the X1Σ+ and A1Π states of CH+ from a direct-potential-fit analysis. J Chem Phys 2016; 144:024311. [DOI: 10.1063/1.4939274] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Young-Sang Cho
- Department of Chemistry, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Robert J. Le Roy
- Department of Chemistry, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
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Chen R, Jiao E, Zhu H, Xie D. A new ab initio potential energy surface and microwave and infrared spectra for the Ne–CO2 complex. J Chem Phys 2010; 133:104302. [DOI: 10.1063/1.3454684] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Li H, Roy PN, Le Roy RJ. An “adiabatic-hindered-rotor” treatment allows para-H2 to be treated as if it were spherical. J Chem Phys 2010; 133:104305. [DOI: 10.1063/1.3476465] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Clifford AA, Kestin J, Wakeham WA. The Viscosity of Mixtures of Hydrogen with Three Noble Gases. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19810850510] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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11
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Li H, Le Roy RJ, McCourt FRW. Predicted bound states and microwave spectrum of N2-He van der Waals complexes. J Chem Phys 2009; 130:244503. [PMID: 19566162 DOI: 10.1063/1.3157776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Numerical calculations show that four modern potential energy surfaces for N(2)-He all support 18 bound intermolecular states for the homonuclear isotopologues (14,14)N(2)-(4)He and (15,15)N(2)-(4)He, and 12 (or 13, for one surface) truly bound states for (14,15)N(2)-He. This contradicts a recent statement [Patel et al., J. Chem. Phys. 119, 909 (2003)] that one of these surfaces supports no bound states, and it yields predictions for 27 allowed pure rotational transitions among the truly bound states of the homonuclear isotopologues of this complex.
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Affiliation(s)
- Hui Li
- Department of Chemistry, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.
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Ran H, Xie D. A new potential energy surface and predicted infrared spectra of He–CO2: Dependence on the antisymmetric stretch of CO2. J Chem Phys 2008; 128:124323. [DOI: 10.1063/1.2844786] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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13
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Li H, Le Roy RJ. Analytic three-dimensional ‘MLR’ potential energy surface for CO2–He, and its predicted microwave and infrared spectra. Phys Chem Chem Phys 2008; 10:4128-37. [DOI: 10.1039/b800718g] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Xie D, Ran H, Zhou Y. Potential energy surfaces and predicted infrared spectra for van der Waals complexes: dependence on one intramolecular vibrational coordinate. INT REV PHYS CHEM 2007. [DOI: 10.1080/01442350701437926] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Beswick JA, Jortner J. Intramolecular Dynamics of Van Der Waals Molecules. ADVANCES IN CHEMICAL PHYSICS 2007. [DOI: 10.1002/9780470142677.ch7] [Citation(s) in RCA: 209] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Coxon JA, Dickinson CS. Application of direct potential fitting to line position data for the X (1)Sigma(+) and A (1)Sigma(+) states of LiH. J Chem Phys 2006; 121:9378-88. [PMID: 15538857 DOI: 10.1063/1.1788659] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
A collection of 9089 spectroscopic LiH line positions, of widely varying precision, which sample 84.9% and 98.6% of the A and X state well depths, respectively, have been employed in a direct least-squares fit of the effective potential energy and Born-Oppenheimer breakdown functions for the two states. For the four isotopomers (6)LiH, (7)LiH, (6)LiD, and (7)LiD, the data comprise both pure rotational and vibration-rotational transitions within the ground state, as well as rotationally resolved transitions in the A-X system. Despite the unusual shape and associated anomalous properties of the A state potential, no special features or considerations were required in the direct potential fitting approach. The reduced standard deviation of the fit was close to unity, indicating that the quantum mechanical eigenvalues calculated from the fully analytical functions of the Hamiltonians of the two states, which are characterized by a total of only 53 fitted parameters, represent the line positions, on average, to within the estimated uncertainties. A quantum mechanical calculation of the molecular constants G(nu), B(nu), D(nu), H(nu), L(nu), M(nu), N(nu), and O(nu) from the fitted potential for the A state of (7)LiH confirms that the usual polynomial expansion in J(J+1) is an unsatisfactory representation for the rotational terms of the lowest vibrational levels.
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Affiliation(s)
- John A Coxon
- Department of Chemistry, Dalhousie University, Halifax, Nova Scotia B3H4J3, Canada.
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21
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Zhou Y, Ran H, Xie D. A five-dimensional potential energy surface and predicted infrared spectra for the N2O-hydrogen complexes. J Chem Phys 2006; 125:174310. [PMID: 17100442 DOI: 10.1063/1.2363992] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present a five-dimensional potential energy surface for the N(2)O-hydrogen complex using supermolecular approach with the full counterpoise correction at the coupled-cluster singles and doubles with noniterative inclusion of connected triple level. The normal mode Q(3) for the nu(3) antisymmetric stretching vibration of the N(2)O molecule was included in the calculations of the potential energies. The radial discrete variable representation/angular finite basis representation method and Lanczos algorithm were employed to calculate the rovibrational energy levels for four species of N(2)O-hydrogen complexes (N(2)O-para-H(2), -ortho-H(2), -ortho-D(2), and -para-D(2)) without separating the inter- and intramolecular vibrations. The calculated band origins are all blueshifted relative to the isolated N(2)O molecule and in good agreement with the experimental values. The calculated rotational spectroscopic constants and molecular structures agree well with the available experimental results. The frequencies and line intensities of the rovibrational transitions in the nu(3) region of N(2)O for the van der Waals ground vibrational state were calculated and compared with the observed spectra. The predicted infrared spectra are consistent with the observed spectra and show that the N(2)O-H(2) complexes are mostly a-type transitions while both a-type and b-type transitions are significant for the N(2)O-D(2) complexes.
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Affiliation(s)
- Yanzi Zhou
- Institute of Theoretical and Computational Chemistry, Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
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22
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Jackson KC, Langridge-Smith PR, Howard BJ. The rotational spectra and structure of van der Waals complexes. Mol Phys 2006. [DOI: 10.1080/00268978000100711] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Brocks G, van der Avoird A, Sutcliffe B, Tennyson J. Quantum dynamics of non-rigid systems comprising two polyatomic fragments. Mol Phys 2006. [DOI: 10.1080/00268978300102831] [Citation(s) in RCA: 156] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Hutson JM, Howard BJ. Spectroscopic properties and potential surfaces for atom-diatom van der Waals molecules. Mol Phys 2006. [DOI: 10.1080/00268978000103831] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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28
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Yoshioka† K, Raston PL, Anderson DT. Infrared spectroscopy of chemically doped solid parahydrogen. INT REV PHYS CHEM 2006. [DOI: 10.1080/01442350600802766] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Zhou Y, Xie D, Zhang DH. A three-dimensional ab initio potential energy surface and predicted infrared spectra for the He–N2O complex. J Chem Phys 2006; 124:144317. [PMID: 16626206 DOI: 10.1063/1.2189227] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
We report a three-dimensional ab initio potential energy surface for He-N(2)O using a supermolecular method at the coupled-cluster singles and doubles with noniterative inclusion of connected triple level. Besides the intermolecular stretching and bending modes, we included the Q(3) normal mode for the nu(3) antisymmetric stretching vibration of N(2)O molecule in order to simulate the observed infrared spectra in the nu(3) region of N(2)O, especially to explain the frequency shift of the band origin in the infrared spectra. The harmonic oscillator approximation is used for the potential curve of the Q(3) mode of the isolate N(2)O molecule. The intermolecular potential energy surfaces are calculated for five potential-optimized discrete variable representation grid points of the Q(3) mode. The three-dimensional discrete variable representation method was employed to calculate the rovibrational states without separating the inter- and intramolecular nuclear motions. The calculated transition frequencies and line intensities of the rotational transitions in the nu(3) region of N(2)O for the van der Waals ground vibrational state are in good agreement with the observed infrared spectra. The calculated band shifts are found to be 0.1704 and 0.1551 cm(-1) for (4)He-N(2)O and (3)He-N(2)O, respectively, which agree well with the observed values of 0.2532 and 0.2170 cm(-1).
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Affiliation(s)
- Yanzi Zhou
- Laboratory of Mesoscopic Chemistry, Institute of Theoretical and Computational Chemistry, Nanjing University, Nanjing 210093, China
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Zhou Y, Xie D. Three-dimensional ab initio potential-energy surface and rovibrational spectra of the H2–Kr complex. J Chem Phys 2005; 123:134323. [PMID: 16223304 DOI: 10.1063/1.2042448] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
We report a three-dimensional ab initio potential-energy surface for the H2-Kr complex calculated using a supermolecular method. The electronic calculations were performed at the coupled-cluster singles and doubles level with noniterative inclusion of connected triples levels with a large basis set including midbond functions and the full counterpoise correction for the basis-set superposition error. The intermolecular potential energy between the H2 molecule and the Kr atom were evaluated at five potential-optimized discrete variable representation (DVR) grid points generated from the potential-energy curve of H2. The potential for other bond lengths of H2 could be deduced using polynomial interpolations. The complex is found to have a linear preferred structure with a rather flat energy barrier. The three-dimensional DVR method and the Lanczos propagation algorithm were employed to calculate the rovibrational states without separating the inter- and intramolecular nuclear motions. In addition, the rovibrational spectra from the H2 fundamental vibrational band were calculated. The calculated shift for the band origin is -1.50 cm-1, which is in good agreement with the experimental value of -1.706 cm-1, and the calculated transition frequencies in Q1(0) and S1(0) bands are within 3% of the observed values.
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Affiliation(s)
- Yanzi Zhou
- Institute of Theoretical and Computational Chemistry, Laboratory of Mesoscopic Chemistry, Department of Chemistry, Nanjing University, Nanjing 210093, China
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31
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Sumiyoshi Y, Endo Y. Spectroscopy of Ar–SH and Ar–SD. II. Determination of the three-dimensional intermolecular potential-energy surface. J Chem Phys 2005; 123:054325. [PMID: 16108657 DOI: 10.1063/1.1943968] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
All the pure rotational transitions reported in the previous studies [J. Chem. Phys. 113, 10121 (2000); J. Mol. Spectrosc. 222, 22 (2003)] and newly observed rotation-vibration transitions, P = 1/2 <-- 3/2, for Ar-SH and Ar-SD [J. Chem. Phys. (2005), the preceding paper] have been simultaneously analyzed to determine a new intermolecular potential-energy surface of Ar-SH in the ground state. A Schrodinger equation considering the three-dimensional freedom of motion for an atom-diatom complex in the Jacobi coordinate, R, theta, and r, was numerically solved to obtain energies of the rovibrational levels using the discrete variable representation method. A three-dimensional potential-energy surface is determined by a least-squares fitting with initial values of the parameters for the potential obtained by ab initio calculations at the RCCSD(T)/aug-cc-pVTZ level of theory. The potential well reproduces all the observed data in the microwave and millimeter wave regions with parity doublings and hyperfine splittings. Several low-lying rovibrational energies are calculated using the new potential-energy surface. The dependence of the interaction energy between Ar and SH(2pi(i)) on the bond length of the SH monomer is discussed.
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Affiliation(s)
- Yoshihiro Sumiyoshi
- Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902, Japan
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32
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Van der Waals systems: Molecular orbitals, physical properties, thermodynamics of formation and reactivity. Top Curr Chem (Cham) 2005. [DOI: 10.1007/3-540-10058-x_8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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33
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Murrell JN. The potential energy surfaces of polyatomic molecules. STRUCTURE AND BONDING 2005. [DOI: 10.1007/3-540-08014-7_3] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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McKellar ARW. High resolution infrared spectra of H2-Kr and D2-Kr van der Waals complexes. J Chem Phys 2005; 122:84320. [PMID: 15836052 DOI: 10.1063/1.1850461] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Infrared spectra of weakly bound hydrogen-krypton complexes have been studied at high spectral resolution (0.04 cm(-1)) using a long-path (154 m) low temperature (100 K) absorption cell and a Fourier transform spectrometer. In addition to spectra from the regions of the H(2) and D(2) fundamental vibrational bands in the midinfrared, the results also include the region of the pure rotational S(0)(0) transition of H(2) in the far infrared. A total of 219 measured line positions from these spectra have been fully assigned to specific quantum transitions and form the basis for determining a greatly improved semiempirical three-dimensional intermolecular potential energy surface for hydrogen-krypton in an accompanying paper.
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Affiliation(s)
- A R W McKellar
- Steacie Institute for Molecular Sciences, National Research Council of Canada, Ottawa, Ontario K1A 0R6, Canada
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Wei H, Le Roy RJ, Wheatley R, Meath WJ. A reliable new three-dimensional potential energy surface for H2–Kr. J Chem Phys 2005; 122:84321. [PMID: 15836053 DOI: 10.1063/1.1850462] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
An improved three-dimensional potential energy surface for the H(2)-Kr system is determined from a direct fit of new infrared spectroscopic data for H(2)-Kr and D(2)-Kr to a potential energy function form based on the exchange-Coulomb model for the intermolecular interaction energy. These fits require repetitive, highly accurate simulations of the observed spectra, and both the strength of the potential energy anisotropy and the accuracy of the new data make the "secular equation perturbation theory" method used in previous analyses of H(2)-(rare gas) spectra inadequate for the present work. To address this problem, an extended version of the "iterative secular equation" method was developed which implements direct Hellmann-Feynman theorem calculation of the partial derivatives of eigenvalues with respect to parameters of the Hamiltonian which are required for the fits.
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Affiliation(s)
- Hua Wei
- Guelph-Waterloo Center for Graduate Work in Chemistry and Biochemistry, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
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36
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Olivares Del Valle FJ, Tolosa S, Piñeiro AL, Requena A. Ab initiocalculations of intermolecular potentials. The ground state of the ArH2van der Waals molecule. J Comput Chem 2004. [DOI: 10.1002/jcc.540060107] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Sabzyan H, McCourt FRW, Power WP. Experimental and theoretical study of proton spin-lattice relaxation in H2–Ar gas mixtures: Critical examination of the XC(fit) potential energy surface. J Chem Phys 2004; 120:4306-15. [PMID: 15268600 DOI: 10.1063/1.1644099] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Proton nuclear magnetic resonance spin-lattice relaxation time measurements have been carried out at 500 MHz proton Larmor frequency on two hydrogen-argon gas mixtures with 1.90% and 3.93% hydrogen at four different temperatures in the range 225 K < T < 337 K and at two different number densities. The results for different hydrogen mole percentages have been extrapolated to infinite dilution to obtain the contributions to the overall relaxation times arising from the hydrogen-argon interaction. The extrapolated relaxation times fall in the reciprocal regime in which relaxation times are inversely proportional to the density. Relaxation times have also been calculated using quantum mechanical close-coupled computations based on the H2-Ar XC(fit) potential energy surface obtained by Bissonnette et al. [J. Chem. Phys. 105, 2639 (1996)]. Significant differences found between the experimental and theoretical results indicate that the short-range anisotropy of the XC(fit) potential surface is too weak. The reciprocal regime is shown to have a much higher sensitivity to changes in the anisotropic component of the intermolecular potential energy surface.
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Affiliation(s)
- Hassan Sabzyan
- Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
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Zeimen WB, Kłos J, Groenenboom GC, van der Avoird A. Diabatic intermolecular potentials and bound states of open-shell atom–molecule dimers: Application to the F([sup 2]P)–H[sub 2] complex. J Chem Phys 2003. [DOI: 10.1063/1.1562623] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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39
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Wang X, Magnes J, Lyyra AM, Ross AJ, Martin F, Dove PM, Le Roy RJ. Born–Oppenheimer breakdown in a combined-isotopomer analysis of the A 1Σu+–X 1Σg+ system of Li2. J Chem Phys 2002. [DOI: 10.1063/1.1514670] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Castillo-Chará J, Lucchese RR, Bevan JW. Differentiation of the ground vibrational and global minimum structures in the Ar:HBr intermolecular complex. J Chem Phys 2001. [DOI: 10.1063/1.1379337] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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41
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Wormer PE, van Der Avoird A. Intermolecular potentials, internal motions, and spectra of van der waals and hydrogen-bonded complexes. Chem Rev 2000; 100:4109-44. [PMID: 11749342 DOI: 10.1021/cr990046e] [Citation(s) in RCA: 117] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- P E Wormer
- Institute of Theoretical Chemistry, NSR Center, University of Nijmegen, Toernooiveld 1, 6525 ED Nijmegen, The Netherlands
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42
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Wang F, McCourt FRW, Le Roy RJ. Dipole moment surfaces and the mid- and far-IR spectra of N2-Ar. J Chem Phys 2000. [DOI: 10.1063/1.481778] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Hajigeorgiou PG, Le Roy RJ. A “modified Lennard-Jones oscillator” model for diatom potential functions. J Chem Phys 2000. [DOI: 10.1063/1.480946] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Frishman E, Shapiro M, Brumer P. Optimized Imploding Waves in the Coherent Control of Bimolecular Processes: Atom−Rotor Scattering. J Phys Chem A 1999. [DOI: 10.1021/jp9922920] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Einat Frishman
- Chemical Physics Department, The Weizmann Institute of Science, Rehovot, Israel
| | - Moshe Shapiro
- Chemical Physics Department, The Weizmann Institute of Science, Rehovot, Israel
| | - Paul Brumer
- Photonics Research Ontario and Chemical Physics Theory Group, University of Toronto, Toronto, Canada M5S 3H6
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Heidberg J, Voßberg A, Hustedt M, Thomas M, Briquez S, Picaud S, Girardet C. Monolayers of ortho-H2, para-H2, para-D2 and normal-H2 adsorbed on NaCl(001) single crystal surfaces. J Chem Phys 1999. [DOI: 10.1063/1.477963] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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47
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Mrugała F, Moszynski R. Near-infrared absorption spectrum of the Ar–HD complex: Confrontation of theory with experiment. J Chem Phys 1998. [DOI: 10.1063/1.477779] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Briquez S, Picaud S, Girardet C, Hoang PNM, Heidberg J, Voßberg A. Adsorption of ortho and para H2 on NaCl(001). J Chem Phys 1998. [DOI: 10.1063/1.477288] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Le Roy R. Uncertainty, Sensitivity, Convergence, and Rounding in Performing and Reporting Least-Squares Fits. JOURNAL OF MOLECULAR SPECTROSCOPY 1998; 191:223-231. [PMID: 9753556 DOI: 10.1006/jmsp.1998.7646] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
This paper describes a procedure for optimal rounding of parameters determined from a linear or nonlinear least-squres fit in order to minimize the number of digits which must be quoted while ensuring that the resulting rounded constants can predict the input data with no significant loss of precision. Related problems concerning nonlinear least-squares convergence and taking account of model dependence of fitted or predicted parameters are also addressed. The recommended rounding procedure is illustrated by applications to electronic band data for the A-X system of I2 and to infrared and microwave data for HF (yielding optimal new Dunham expansion coefficients for ground state HF). An automated version of this sequential rounding procedure has been incorporated in a general subroutine for performing linear or nonlinear least-squares fits. Copyright 1998 Academic Press.
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Glaz W, Tabisz GC. Collisional propagation effects in collision-induced rotational spectra. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1996; 54:3903-3911. [PMID: 9913937 DOI: 10.1103/physreva.54.3903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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